1,2,3,4-Tetrahydro-13H-(1)benzothieno(2',3':4,5)pyrimido(2,1-b)benzoxazol-13-one 13H-(1)Benzothieno(2',3':4,5)pyrimido(2,1-b)benzoxazol-13-one, 1,2,3,4-tetrahydro- 159852-68-3 9,10,11,12-Tetrahydro-12H-benzothieno(2',3':4,5)pyrimido(2,1-b)benzoxazol-12-one